There's a reason why more than two million women turn to TheBump.com each month. From its sassy and straightforward tone to its honest advice and fun visuals, the website is the go-to resource for the modern mom-to-be. Here, the experts behind The Baby Bump bring their wisdom to moms expecting multiples. Packed with expert advice and insights, this comprehensive guide answers the questions expectant moms are sure to have (like "Are my babies growing at the same rate?" and "Can they both sleep in one crib?"), all enhanced with colorful art, making it mom's essential resource as she waits for her bundles of joy.

Carley Roney is the co-founder and editor in chief of XO Group Inc. She lives with her family in Brooklyn, New York.